The AsAs bond length in elemental arsenic is 2.48 . The ClCl bond length in Cl 2

The As—As bond length in elemental arsenic is 2.48 Å. The Cl—Cl bond length in Cl₂ is 1.99 Å.

(a) Based on these data, what is the predicted As—Cl bond length in arsenic trichloride, AsCl₃, in which each of the three Cl atoms is bonded to the As atom?

(b) What bond length is predicted for AsCl₃, using the atomic radii in Figure 7.7?

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1A 2A 0.31 8A 7A 3A AA 5A 6A Be 0.96 He 0,28 Li 128 N 10.84 0.76 0.71 0.66 0.57 0.58 B Increasing radius Ne Mg Na 1.66 1,41 Al Si P. Ar Cr Mn 1.21 1.11 1.07 1.05 1.02 1.06 V. Fe Co Ni Cu Zn Ga Ca Se Ti K. 170 1.60 1.53 1.3 1.391.32 1.26 1.24 1.32 1.22 1.22 1.20 1.19 1.201.20 1.16 Ge As Se Br Kr 2,03 Nb Mo 1.95 190 1.75 1.64 1.54 1.47 1.46 |142 1.39 Sr Y Zr Te Ru Rh Pd Rb Ag Cd In Sn Sb Te 2.20 1.45 1.44 1421391.39 |1.38 1.39 1.40 Xe Radius (Å) Increasing radius